Dust mop cover



FIG. 1 is a front perspective view of a dust mop cover, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a side elevational view thereof.

The broken line disclosure of a mop handle in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a dust mop cover, substantially as shown and described. 